Transparent electrically conductive film and touch panel including the same

A technology of transparent conductive film and conductive polymer, which is applied to the conductive layer, non-metallic conductor, organic material conductor, etc. , Writing durability deterioration and other problems, to achieve the effect of improving self-healing, suppressing cracks, and improving writing durability

Inactive Publication Date: 2010-01-20
NOF CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the transparent conductive film described in Patent Document 1, the hardness of the transparent conductive film is specified to be 0.4 to 0.8 GPa. Although the brittleness of the transparent conductive film is suppressed, the durability against abrasion degradation during sliding of the pen is limited. performance is improved, but the thickness of the transparent conductive film is extremely thin, such as 22 to 27 nm (Example of Patent Document 1)
Therefore, it is difficult to relieve the stress generated by the sliding of the pen in long-term use only by relying on the transparent conductive film, and damage and cracks will occur on the hardened layer and the transparent conductive film, which is not durable.
[0011] In addition, the transparent conductive film described in Patent Document 2 only specifies the hardness of the buffer layer, but the adjustment of the hardness alone cannot eliminate the depression (depression) generated by pen input during use, and its existence will leave a depression. Deterioration of mark and writing durability and poor appearance
In addition, the transparent conductor described in Patent Document 3 has the following problems. The transparent conductive film itself is formed of an organic conductive composition, which has poor durability, and the transparent conductive film is directly formed on the transparent substrate, so it is difficult for pen input to occur. Stress, its stress relaxation effect is not sufficient, and the transparent conductive film will peel off during use

Method used

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  • Transparent electrically conductive film and touch panel including the same
  • Transparent electrically conductive film and touch panel including the same
  • Transparent electrically conductive film and touch panel including the same

Examples

Experimental program
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Embodiment

[0103] Hereinafter, the above-mentioned embodiment will be described more concretely with reference to production examples, examples, and comparative examples, but the present invention is not limited by the scope of these examples. The Martens hardness, haze value, total light transmittance, surface resistivity, and writing durability in each example were measured by the following methods. In addition, the part in each example represents a weight part.

[0104] (1) Martens Hardness

[0105] On the PET film as the transparent substrate 12, the curable composition used to form the soft resin layer is coated with a dry film thickness of 30 μm and cured to form the soft resin layer 13, which is tested by ultramicrohardness The Martens hardness (N / mm 2 ). The measurement conditions are temperature 20° C., relative humidity 50%, maximum load 2 mN, first creep: 5 seconds, second creep: 5 seconds.

[0106] (2) Haze value

[0107] Using NDH-2000 produced by Nippon Densho Kogyo Co...

manufacture example 1-1

[0118] [Manufacturing Example 1-1, Preparation of Curable Coating Liquid (F-1) for Forming Soft Resin Layer]

[0119] 2.1 parts of hexamethylene diisocyanate [produced by Mitsui Takeda Chemical Co., Ltd., trade name: TAKENATE 700] and polycaprolactone-modified hydroxyethyl ester [produced by Daicel Chemical Industry Co., Ltd., trade name: PLACCEL FA10L, poly Repeating number of caprolactone units = 10] 90 parts of amine acrylate composed of 97.9 parts, phthalic acid monohydroxyethyl methacrylate [manufactured by Toagosei Co., Ltd., trade name: M-5400] 6.8 parts, 1- 3 parts of hydroxycyclohexyl phenylacetone, 0.2 parts of a surface conditioner [manufactured by BYK Chemicals, trade name "BYK-381"], and 100 parts of methyl ethyl ketone were mixed to prepare a curable coating for forming a soft resin layer. Liquid (F-1).

[0120] The curable coating solution for forming the soft resin layer contained 80% by weight of the repeating unit represented by the above chemical formula (2...

manufacture example 1-2

[0121] [Manufacturing Example 1-2, Preparation of Curable Coating Liquid (F-2) for Forming Soft Resin Layer]

[0122]20.5 parts of isocyanurate-modified acrylate amine ester [Mitsui Takeda Chemical Co., Ltd., trade name: TAKENATE D-170] from hexamethylene diisocyanate, and polycaprolactone-modified hydroxyethyl ester [Daicel Produced by Chemical Industry Co., Ltd., product name: PLACCEL FA5, repeating number of polycaprolactone units = 5] 90 parts of acrylate amine ester composed of 79.5 parts, 2-hydroxypropyl acrylate [manufactured by Osaka Organic Chemical Industry Co., Ltd., commercial product Name: 6.8 parts of HPA], 3 parts of 1-hydroxycyclohexyl phenylacetone, 0.2 parts of a surface conditioner (manufactured by BYK Chemicals, trade name "BYK-381") and 100 parts of methyl ethyl ketone are mixed to prepare for Curable coating solution (F-2) for forming a soft resin layer.

[0123] The curable coating solution for forming the soft resin layer contained 57% by weight of the...

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Abstract

The invention aims to provide a transparent electrically conductive film capable of suppressing the occurrence of damage or crack of organic conductive layer and capable of improving the writing durability for the pen input of touch panel, for example, and a touch panel including the same. A transparent electrically conductive film (11) is formed by providing a soft resin layer (13) on a transparent substrate (12) and laminating an organic conductive layer (14) thereon; under the condition that temperature is 20 degrees centigrade and relative humidity is 50%, the Martens hardness of the softresin layer (13), tested by a ultramicroscopic hardness testing device, is 0.1-70N/sq.mm and the soft resin layer has self-repairing property. The soft resin layer (13) is formed by coating a hard composition to the transparent substrate (1) and hardening it. The hard composition contains a specific repeated unit of 10-90% by weight. The organdic conductive high molecule forming the organic conductive layer (14) can be selected from polythiophene, polypyrrole, polyaniline or polyquinoxaline.

Description

technical field [0001] The present invention relates to a transparent conductive film having good writing durability against repeated pen input, which is used on the front of a touch panel, and a touch panel including the transparent conductive film. Background technique [0002] A transparent conductive film formed by forming a transparent and conductive compound film on a transparent plastic film is widely used in the electrical and electronic fields because of its conductivity, such as flat panel displays such as liquid crystal displays and EL displays, or touch panels transparent electrodes etc. As the transparent conductive film, on at least one side of a transparent film such as polyethylene terephthalate (PET), triacetate cellulose (TAC), vacuum evaporation, sputtering, ion plating method and other dry processes, setting tin oxide (SnO 2 ), indium oxide (In 2 o 3 ) and a mixed sintered body of tin oxide (ITO) or zinc oxide (ZnO), etc. are known. [0003] Using th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/14G06F3/041B32B27/06B32B7/02C09D175/14
CPCB32B7/025B32B27/08G06F3/041H01B1/12H01B5/14
Inventor 木村育弘野岛孝之加藤辰德
Owner NOF CORP
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